
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
7th Edition
ISBN: 9780134802213
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 7.13, Problem 7.24CP
Write a statement that creates an ArrayList object and assigns its address to a variable named frogs.
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Using the following execution shown below, explain what is done in each of the ARIES recovery algorithm phases:
LSN
LOG
00
begin_checkpoint
10
end_checkpoint
20
update: T1 writes P1
30
update: T2 writes P2
40
update: T3 writes P3
50
T2 commit
60
update: T3 writes P2
70
T2 end
80
update: T1 writes P5
90
T3 abort
CRASH, RESTART
In addition to the execution shown here, the system crashes during recovery after writing two log records to stable storage and again after writing another two log records
A new application is being developed and will be using a database that includes a relation about items: Item (item_id:integer, item_name:string, color:string, price:real).
Both the purchasing department in charge of obtaining raw material and the manufacturing department in charge of manufacturing the items can change the price of manufactured items according to changes that may happen in the raw material cost or production cost. The two departments use different transactions to update the price of items. The new application uses the following sequences of actions, listed in the order they are submitted to the DBMS:
Sequence S1: T1:R(X), T2:W(X), T2:W(Y), T3:W(Y), T1:W(Y), T1:Commit, T2:Commit, T3:Commit
Sequence S2: T1:R(X), T2:W(Y), T2:W(X), T3:W(Y), T1:W(Y), T1:Commit, T2:Commit, T3:Commit
For each of the following concurrency control mechanisms, describe how they will handle each of the sequences (S1 & S2).
Strict 2PL with timestamps used for deadlock prevention.
Conservative…
As a database administrator of a large manufacturing organization, you are in charge of their website database that handles suppliers, parts, catalog, customers, and payments of delivered items. The following relations are part of the large database:
Supplier(SID, Sname, Saddress, Stelephone)Customer(CID, Cname, Caddress, Ctelephone)Part(PID, Pname, Pmodel, Pcolor)Catalog(SID, PID, Price)
(The Catalog relation lists the prices charged for parts by Suppliers).
Because the application is web-based and the database is accessed by many users, you want to increase the concurrency usage without compromising the data quality. For each of the following transactions, state the minimum SQL isolation level you would use in order to avoid any conflict problems in them. Please explain your choice.
A transaction that adds a new part to a supplier’s catalog.
A transaction that increases the price that a supplier charges for a part.
A transaction that determines the total number of items for a given…
Chapter 7 Solutions
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Ch. 7.1 - Write statements that create the following arrays:...Ch. 7.1 - Whats wrong with the following array declarations?...Ch. 7.1 - Prob. 7.3CPCh. 7.1 - Prob. 7.4CPCh. 7.1 - Prob. 7.5CPCh. 7.1 - Prob. 7.6CPCh. 7.1 - Prob. 7.7CPCh. 7.1 - Prob. 7.8CPCh. 7.2 - Prob. 7.9CPCh. 7.2 - Prob. 7.10CP
Ch. 7.2 - A program has the following declaration: double[]...Ch. 7.2 - Look at the following statements: int[] a = { 1,...Ch. 7.3 - Prob. 7.13CPCh. 7.3 - Write a method named zero, which accepts an int...Ch. 7.6 - Prob. 7.15CPCh. 7.7 - Recall that we discussed a Rectangle class in...Ch. 7.10 - Prob. 7.17CPCh. 7.11 - What value in an array does the selection sort...Ch. 7.11 - How many times will the selection sort swap the...Ch. 7.11 - Prob. 7.20CPCh. 7.11 - Prob. 7.21CPCh. 7.11 - If a sequential search is performed on an array,...Ch. 7.13 - What import statement must you include in your...Ch. 7.13 - Write a statement that creates an ArrayList object...Ch. 7.13 - Write a statement that creates an ArrayList object...Ch. 7.13 - Prob. 7.26CPCh. 7.13 - Prob. 7.27CPCh. 7.13 - Prob. 7.28CPCh. 7.13 - Prob. 7.29CPCh. 7.13 - Prob. 7.30CPCh. 7.13 - Prob. 7.31CPCh. 7 - In an array declaration, this indicates the number...Ch. 7 - Each element of an array is accessed by a number...Ch. 7 - The first subscript in an array is always. a. 1 b....Ch. 7 - The last subscript in an array is always. a. 100...Ch. 7 - Array bounds checking happens. a. when the program...Ch. 7 - This array field holds the number of elements that...Ch. 7 - Prob. 7MCCh. 7 - This search algorithm repeatedly divides the...Ch. 7 - Prob. 9MCCh. 7 - When initializing a two-dimensional array, you...Ch. 7 - Prob. 11MCCh. 7 - To delete an item from an ArrayList object, you...Ch. 7 - To determine the number of items stored in an...Ch. 7 - True or False: java does not allow a statement to...Ch. 7 - True or False: An arrays sitze declarator can be a...Ch. 7 - Prob. 16TFCh. 7 - True or False: The subscript of the last element...Ch. 7 - Prob. 18TFCh. 7 - True or False: The Java compiler does not display...Ch. 7 - Prob. 20TFCh. 7 - True or False: The first size declarator in the...Ch. 7 - Prob. 22TFCh. 7 - Prob. 23TFCh. 7 - int[] collection = new int[-20];Ch. 7 - Prob. 2FTECh. 7 - Prob. 3FTECh. 7 - Prob. 4FTECh. 7 - Prob. 5FTECh. 7 - The variable names references an integer array...Ch. 7 - The variables numberArray1 and numberArray2...Ch. 7 - Prob. 3AWCh. 7 - In a program you need to store the populations of...Ch. 7 - In a program you need to store the identification...Ch. 7 - Prob. 6AWCh. 7 - Prob. 7AWCh. 7 - Prob. 8AWCh. 7 - Prob. 9AWCh. 7 - Prob. 10AWCh. 7 - Prob. 11AWCh. 7 - Prob. 1SACh. 7 - Prob. 2SACh. 7 - Prob. 3SACh. 7 - Prob. 4SACh. 7 - Prob. 5SACh. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Prob. 8SACh. 7 - Prob. 9SACh. 7 - Rainfall Class Write a RainFall class that stores...Ch. 7 - Payroll Class Write a Payroll class that uses the...Ch. 7 - Charge Account Validation Create a class with a...Ch. 7 - Charge Account Modification Modify the charge...Ch. 7 - Prob. 5PCCh. 7 - Drivers License Exam The local Drivers License...Ch. 7 - Magic 8 Ball Write a program that simulates a...Ch. 7 - Grade Book A teacher has five students who have...Ch. 7 - Grade Book Modification Modify the grade book...Ch. 7 - Average Steps Taken A Personal Fitness Tracker is...Ch. 7 - Array Operations Write a program with an array...Ch. 7 - Prob. 12PCCh. 7 - Sorted List of 1994 Gas Prices Note: This...Ch. 7 - Name Search If you have downloaded this books...Ch. 7 - Population Data If you have downloaded this books...Ch. 7 - World Series Champions If you have downloaded this...Ch. 7 - 2D Array Operations Write a program that creates a...Ch. 7 - Prob. 18PCCh. 7 - Trivia Game In this programming challenge, you...Ch. 7 - Prob. 20PC
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